From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#44610: 27.1; Keyboard Macro Performance Problem Date: Sat, 14 Nov 2020 16:26:30 +0200 Message-ID: <83pn4gui95.fsf@gnu.org> References: <87d00irmu7.fsf@robertthorpeconsulting.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27497"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 44610@debbugs.gnu.org To: Robert Thorpe Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 14 15:27:13 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kdwWF-00071I-CH for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 14 Nov 2020 15:27:11 +0100 Original-Received: from localhost ([::1]:56396 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kdwWE-0005xT-EN for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 14 Nov 2020 09:27:10 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41004) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kdwW6-0005wo-IQ for bug-gnu-emacs@gnu.org; Sat, 14 Nov 2020 09:27:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:38645) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kdwW6-0006AL-9g for bug-gnu-emacs@gnu.org; Sat, 14 Nov 2020 09:27:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kdwW6-00064R-6C for bug-gnu-emacs@gnu.org; Sat, 14 Nov 2020 09:27:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 14 Nov 2020 14:27:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44610 X-GNU-PR-Package: emacs Original-Received: via spool by 44610-submit@debbugs.gnu.org id=B44610.160536401123319 (code B ref 44610); Sat, 14 Nov 2020 14:27:02 +0000 Original-Received: (at 44610) by debbugs.gnu.org; 14 Nov 2020 14:26:51 +0000 Original-Received: from localhost ([127.0.0.1]:50191 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kdwVv-000643-0Y for submit@debbugs.gnu.org; Sat, 14 Nov 2020 09:26:51 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:40882) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kdwVt-00063q-3k for 44610@debbugs.gnu.org; Sat, 14 Nov 2020 09:26:49 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:55117) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kdwVn-000652-A2; Sat, 14 Nov 2020 09:26:43 -0500 Original-Received: from [176.228.60.248] (port=1869 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kdwVl-00006Z-Tr; Sat, 14 Nov 2020 09:26:42 -0500 In-Reply-To: <87d00irmu7.fsf@robertthorpeconsulting.com> (message from Robert Thorpe on Fri, 13 Nov 2020 02:51:12 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:193281 Archived-At: > From: Robert Thorpe > Date: Fri, 13 Nov 2020 02:51:12 +0000 > > > This bug report comes from a discussion on Emacs reddit. > > Start with a blank buffer and create about ~300 lines of the string: > > ffffffffffffffffffff (pppppppppppppppppppp); > > This will be turned into: > > 'ffffffffffffffffffff': > > That can be done using the following keyboard macro: M-m ' M-f ' : C-k > C-n > > You can apply that to every line in the buffer using C-u 300 f4. > > Now here's the strange bit. In a fundamental-mode buffer this is > extremely fast, nearly instantaneous. But, in a python-mode buffer it > takes 20 to 30 seconds. If the mode is c-mode then it is also much > slower than fundamental-mode. It will also exceed the variable binding > depth in some cases. Oddly it is faster if you use forward-line instead > of C-n. I suggest to produce and present a profile of this. Invoke this macro after "M-x profiler-start RET RET", then "M-x profiler-report RET", expand the profile fully by "C-u RET" on the top line, and post the result here. That should give some clues.